Knot-saw guard



(No Model.)

' A. TOUOHETTE.

KNOT SAW GUARD.

Patented June 22, 1886.

N PETER5. Pholoullwgnpher, Wnhlnglon. D. c

UNITED STATES ATENT Trice.

ALFRED TOUGHETTE, OF MANISTEE, MICHIGAN.

KNOT-SAW GUARD.

SPECIFICATION forming part of Letters Patent No. 344,292, dated June22,1886.

Application filed April 5, 1886. Serial No. 197,769.

To aZZ whom it may concern.-

Be it known that I, ALFRED ToUoHETTE, a citizen of the United States,residing at Manistee, in the county of Manistee and State of Michigan,have invented certain new and useful Improvements in Knot-Saw Guards;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

My invention relates to knot-saw guards; and it consists in theconstruction and arrangement of the parts, which will be more fullyhereinafter described, and pointed out in the claims.

One object of my invention is to provide means whereby an operator isprotected from injury by the saw, especially when sawing lumbercontaining knots or irregular fibers.

A further object of my invention is to so arrange the parts of thedevice that one portion thereof shall be adapted to be opened or closed,as desired, to clean or in any other mannerfiX or adjust the saw, bymeans which are simple in their construction, readily operated, andcheaply manufactured.

I attain these objects by the mechanism illustrated in the accompanyingdrawings,wherein like letters of reference indicate similar parts in theseveral views, and in which- Figure 1 is a side elevation of a knot-sawwith my improved upper and lower guard arranged in their relativepositions therewith. Fig. 2 is a transverse vertical section on the linea? x of Fig. 1, looking from the rear.

A indicates the upper section of the guard, which is rigidly attached tobeams or standards by the strips a a, secured thereto. B and B are thesections forming the lowerguard separate and apart from theuppersection, A. The upper section of the guardAis constructed in theform of a hood, being hollowed out so as to just give the knot-sawsufficient room for free movement, being fitted over said saw. The lowerguard is constructed of two sections, B and B, the section B beingrigidly attached to suitable standards by the strips b b, secured tosaid section, and the section B is hinged to the section B by means ofhinges b b, and is adapted to open in a manner similar to a door. Theseupper and lower sections A and B B, forming the guard, almost entirelyenvelop (No model.)

the saw, leaving a space suflicient for the saw to have free revolutiontherein, asmall space, a, being left between the upperscction, A, andthe two sections B and B, comprising the up per and lowerguards. Thisspace a is of such height as to just permit the passage of ashingletherethrough, leaving no space whereby the operators hands could getinto contact with the saw. The doorsectionBof the lower guard isprovided with a latch, V, which is pivoted thereto, and which engageswith the lug If on the rigid section B of said lower guard, and securesthe said section B to the section B when in a closed position.

The rear lower portion of the two parts B and B, comprising the lowerguard, is pro vided with a duct, 0, through which the sawdust passesfrom the saw, and is carried away from the discharge-opening of saidduct to a suitable place of deposit.

The saw S is of the ordinary form of knotsaw, and is mounted on the endof a shaft, S, which passes out through the bearing formed in the fixedsection B of the lower guard to a suitable rest or trestle, S. Adriving-pulley, P, is mounted on this shaft S, to which a driving-beltmay be attached for the transmission of power to said pulley and to thesaw.

A feeding-table, D, is secured to the lower section of the guard bysuitable means, and is relatively situated with the opening abetween theupper section, A, and the lower sections, B and B, comprising the upperand lower guard, respectively.

The use which I propose making of myimproved device is for sawing orslitting shingles containing knots or defective portions after they havebeen properly sized by another machine.

The shingle Z is placed on the table D and fed through the opening a tothe saw S, the said shingle just filling the space or opening a, thedefective part at the same time being cut out.

By this construction of upper and lower guards the operator is shieldedagainst injury by the saw-blade, the hood or upper section,

A, of the guard protecting the upper part of 100 his person, and thelower section shielding his limbs from injury.

The device can be readily arranged, constructed, and adjusted toaccommodate various other purposes without departing from the nature andprinciple of my invention.

Having thus described my invention, whatI claim as new, and desire tosecure by Letters Patent, isi 1. In a knot-saw guard, the combination ofan upper section, a lower section composed of two parts, one of which isrigidly secured, and the other hinged to the rigid portion and adaptedto be opened or closed, and means for supporting the upper and lowersections in place, and for securing the parts of the lower sectiontogether when closed, substantially as described.

2. In a knot-saw guard, the combination of an upper section cast in onepiece and holcomposed of two parts, one of which is rigid, and the otherhinged to the rigid portion and adapted to be opened or closed, saidupper and lower sections being adapted to envelop

